High-power conditioning for space applications

Article Abstract:

Spacecraft power systems are responsible for the efficient conversion of available solar, chemical, or nuclear energy into electrical power for thermal, altitude control, payload, and housekeeping systems. Such systems require substantial power conditioning. The power systems are typically in one of three types: regulated, sunlight regulated, or unregulated bus voltage. Power distribution to demands are either decentralized DC-DC or centralized DC-AC distribution. The three types of active power-conditioning elements are at the interface of the source and the demand, although not in each type of power system: the unregulated bus only uses active power distribution, the sunlight regulated bus uses solar array conditioning and battery discharge, and the regulated bus uses all three. Modes of control and state-of-the-art power systems are also discussed.

Space vehicle equipment, not elsewhere classified, Signal processing, Power Systems, Space Craft, On-Board Systems

---

High-frequency quasi-resonant converter technologies

Article Abstract:

Quasi-resonant converters (QRCs) are a new family of megahertz-range, high-density power processing systems derived from pulse-width-modulation (PWM) converters whose switches have been replaced by new resonant switching techniques. These techniques, zero-current switching (ZCS) and zero-voltage switching (ZVS) use LC resonant circuits to create zero-current or zero-voltage switching conditions to reduce switching losses, stresses, and noise. ZCS-QRCs can operate in the 1-2MHz switching range, and such convertors have been implemented with power densities to 25W-inE3. ZVS-QRCs have been built with switching frequencies exceeding 10MHz. The theory, technology, and comparative advantages and disadvantages of ZVS-QCRs and ZCS-QCRs are discussed. Examples of power states, gate drives, and single- and double-loop feedback controls are described.

Cost benefit analysis, Product introduction, Switches, Power supplies (Computers), New Technique, Power Supply

---

Similar abstracts:

• Abstracts: Applications of magnetic amplifiers to high-frequency DC-to-DC converters
• Abstracts: Telecommunications applications of integrated optics and optoelectronics. Proceedings letters
• Abstracts: High-frequency high-density converters for distributed power supply systems. Small-signal modeling of pulse-width modulated switched-mode power converters

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.